For an account of James Watt's achievements, see J. Cleland, "Historical Account of the Steam Engine" (1825) and John W. Grant, "Watt and the Steam Age" (1917). On Fulton: R. H. Thurston, "Robert Fulton" (1891) in the "Makers of America" series; A. C. Sutcliffe, "Robert Fulton and the 'Clermont'" (1909); H. W. Dickinson, "Robert Fulton, Engineer and Artist; His Life and Works" (1913). For an account of John Stevens, see George Iles, "Leading American Inventors" (1912), and Dwight Goddard, "A Short Story of John Stevens and His Sons in Eminent Engineers" (1905). See also John Stevens, "Documents Tending to Prove the Superior Advantages of Rail-Ways and Steam-Carriages over Canal Navigation" (1819.), reprinted in "The Magazine of History with Notes and Queries", Extra Number 54 (1917). On Evans: "Oliver Evans and His Inventions," by Coleman Sellers, in "The Journal of the Franklin Institute", July, 1886, vol. CXXII.